MSP430F522x和MSP430F521x设计注意事项

Loader User's Guide (SLAU319).

5SLAA558–November 2012 Designing With MSP430F522x and MSP430F521x Devices Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated

Debugger Connections www.ti.com

8 Debugger Connections

The F522x and F521x devices support both the standard four-wire JTAG interface and the two-wire Spy- Bi-Wire interface.

8.1 JTAG Standard Interface

The F522x and F521x support the standard JTAG interface. The four signals for receiving and sending JTAG signals are shared with Port J general-purpose I/Os and are powered by the DVCC supply domain. The JTAG pin requirements are shown in Table 2. With the connections below, the JTAG can be used to interface with the MSP430 development tools and device programmers.

Table 2. Standard JTAG Interface Pins

DEVICE SIGNAL DIRECTION FUNCTION

PJ.3/TCK IN JTAG clock input

PJ.2/TMS IN JTAG state control

PJ.1/TDI/TCLK IN JTAG data input, TCLK input

PJ.0/TDO OUT JTAG data output

TEST/SBWTCK IN Enable JTAG pins

RSTDVCC/SBWTDIO IN External reset

DVCC, AVCC Device power supply

DVIO I/O power supply

DVSS Ground supply

For further details on interfacing to development tools and device programmers, see the MSP430 Hardware Tool User’s Guide (SLAU278) [4].

8.2 Spy-Bi-Wire Interface

In addition to the standard JTAG interface, the F522x and F521x support the two wire Spy-Bi-Wire interface. Spy-Bi-Wire can be used to interface with the MSP430 development tools and device programmers. The Spy-Bi-Wire signals are powered by the DVCC supply domain and the interface pin requirements are as shown in Table 3.

Table 3. Spy-Bi-Wire Interface Pins

DEVICE SIGNAL DIRECTION FUNCTION

TEST/SBWTCK IN Spy-Bi-Wire clock input

RSTDVCC/SBWTDIO IN, OUT Spy-Bi-Wire data input/output

DVCC, AVCC Device power supply

DVIO I/O power supply

DVSS Ground supply

For further details on interfacing to development tools and device programmers, see the MSP430 Hardware Tool User’s Guide (SLAU278) [4].

8.3 Debugging Without DVIO

It is safe and possible to have only DVCC and not DVIO connected to the device for the purpose of simple device debugging. However, DVIO pins and their related functions are not available in this mode. Additional effects includes higher leakage current during debug; therefore, this option is suitable only for preliminary debugging of the device.

6 Designing With MSP430F522x and MSP430F521x Devices SLAA558–November 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated www.ti.com References.

推荐阅读：

摘 要：德州仪器 推出的新型 MSP430F522x 微控制器系列，能为协处理器设计降低系统总功耗。无需电平转换器即可提供系统级优势。由于能靠这种新双电压轨供电，因此 F522x 微控制器可作为 TI OMAP 处理器与 Sitara 平台等较高功率/性能器件的超低功耗协处理器运行。

摘 要：德州仪器MSP430F522x系列超低功耗微控制器包含多种器件，它们特有面向多种应用的不同外设集。此架构，与扩展低功率描述组合使用，是在便携 式测量应用中实现延长电池寿命的最优选择。该器件具有一个强大的16 位RISC CPU，16 位寄存器。此数控振荡器(DCO) 可在3.5 μs（典型值）内从低功率模式唤醒至激活模式。